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低场磁共振系统上基于质子共振频率的测温研究 被引量：5

Research on Temperature Measurement Based on Proton Resonance Frequency at Low Field MR
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摘要 目的:研究在永磁低场环境下高精度、高时间分辨率的磁共振温度监测。方法:利用基于质子共振频率化学位移的测温方法,在国产0.4T永磁磁共振设备上采用Flash序列采集琼脂凝胶降温过程的数据,并与玻璃温度计的测量结果进行对比。结果:对比温度计读数,磁共振测温实验结果达到头线圈±1.5℃,体线圈±2℃的精度;每次扫描时间为6s。结论:在永磁低场上,基于质子共振频率化学位移测温方法的精度能满足临床要求,时间分辨率能初步满足临床要求,尚需进一步提高。 Objective To research the MR thermometry with high precision and high time resolution at low field MR.Methods The temperature of the cooling process of agar gel phantom was monitored using the method based on proton resonance frequency with 0.4 T home-built permanent MR equipment and Flash sequence,and then the results were compared with those of the thermometer.Results Compared with the thermometer readings,there was a temperature uncertainty as ±1.5 ℃ for head coil and ±2 ℃ for body coil.Scanning duration was 6 seconds.Conclusion The method of MR thermometry at low field based on chemical shifting of PRF with a high accuracy appears to be a viable technique for clinical application.But temporal resolution still needs to improve.
作者 李璟 莫纪江 陈武凡 冯衍秋 辛学刚
机构地区 宁波鑫高益磁材有限公司 南方医科大学生物医学工程学院
出处 《医疗卫生装备》 CAS 2010年第8期15-17,共3页 Chinese Medical Equipment Journal
基金 国家自然科学基金项目(30800254 30730036) 广东省自然科学基金项目(06301304)
关键词 磁共振温度测量 质子共振频率 Flash序列 肿瘤热治疗 MR thermometry proton resonance frequency FLASH sequence thermal ablation
分类号 R445.2 [医药卫生—影像医学与核医学]
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参考文献11

  • 1Malone D E, Wyman D R, DeNardi FG, et ol. Hepatic interstitial laser photocoagulation: An investigation of the relationship between acute thermal lesions and their sonographic images[J]. Invest Radiol, 1994,29(10) :915-921.
  • 2Ishihara Y,Calderon A,Watanabe H,et al. A precise and fast temperature mapping using water proton chemical shift[J]. Magn Reson Med, 1995,34 : 184-823.
  • 3Parker D L, Smith V, Sheldon P, et al. Temperature distribution measure ments in two-dimensional NMR imaging [J]. Med Phys, 1983,10(3) :321-325.
  • 4Le Bihan D, Delannoy J, Levin R L. Temperature mapping with MR imaging of molecular diffusion : application to hyperthermia[J]. Radiology, 1989,171 (3) : 853-857.
  • 5Hindman J C. Proton resonance shift of water in gas and liquid states[J]. J Chem Phys, 1966,44:4 582-4 592.
  • 6Nemethy G, Scheraga H. Structure of water and hydrophobic bonding in proteins. I. A model for the thermodynamic properties of liquid water [J]. J Chem Phys, 1962,36 : 3 382-3 392.
  • 7De poorter J. Noninvasice MRI thermometry with the proton resonance frequency method : study of susceptibility effects[J]. Magn Reson Med, 1995,34 : 358-367.
  • 8De poorter J, De Wagter C, De Deene Y, et al. Noninvasive MRI thermometry with the proton resonance frequency (PRF) method: in vivo results in human muscle[J]. Magn Reson Med, 1995,33 ( 1 ) : 74- 81.
  • 9Chung Yiu-Cho, Phil M, Duerk Jeffrey L, et ol. Temperature measurement using echo-shifted FLASH at low field for interventional MRI[J]. J MRI, 1999,9:138-145.
  • 10Barkauskas K J, Lewin J S, Duerk J L. Variation Correction Algorithm:Analysis of Phase Suppression and Thermal Profile Fidelity for Proton Resonance Frequency Magnetic Resonance Thermometry at 0.2 T[J]. J MRI, 2003,17:227-240.

同被引文献56

  • 1Hynynen K. MRI-guided focused ultrasound treatments [ J ]. Ultrasonics,2010,50 : 221 - 229.
  • 2唐劲天,肿瘤放射生物学[M].北京:人民卫生出版社,2010:2-5.
  • 3Ishihara Y, Calderon A , Watanabe H, et al. A precise and fast temperature mapping using water proton chemical shift[ J]. Magn Reson Med,1995,34:184 - 823.
  • 4Rieke V, Pauly KB. MR thermometry [ J ]. Journal of Magnetic Resonance Imaging, 2008,27 ( 2 ) : 376 - 390.
  • 5Germain D, Chevallier P, Laurent A, et al. MR monitoring of turnout thermal therapy [ J ]. Magnetic Resonance Materials in Physics,2001,13:47 - 59.
  • 6Ishihara Y, Calderon A, Watanahe H, et al. A precise and fast temperature mapping using water proton chemical shift [J]. MRM, 1995,34:814 - 823.
  • 7Parker DL, Smith V, Sheldon P, et al. Temperature distribution measure ments in two -dimensional NMR imaging [ J ]. Med Phys,1983,10(3) :321 -325.
  • 8Le Bihan D, Delannoy J, Levin RL. Temperature mapping with MR imaging of molecular diffusion: application to hyperthermia [ J ]. Radiology, 1989,171 ( 3 ) :853 - 857.
  • 9Germain D, Chevallier P, Laureent A, et al. MR monitoring of tumour thermal therapy [ J ]. Magnetic Resonance Materials in Physics,2001,13:47 - 59.
  • 10Kestutis JB, Jonathan SL, Jeffrey LD, et al. Variation correction algorithm: analysis of phase suppression and thermal profile fidelity for proton resonance frequency magnetic resonance thermometry at 0.2T [ J ]. Magn Reson Imaging , 2003,17 : 227 - 240.

引证文献5

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医疗卫生装备
2010年 第8期

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